Since you are a newbie and haven’t been changing the signature decay method, time constants, or starting training load so go ahead and select Account Settings, Profile, scroll down and select Recalculate Progression. That looks at all activities on file and generates new signature numbers.
If just starting with Xert I suggest reviewing this thread and consider posting answers to the profile questionnaire if you more questions you need answered 
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Beginner questions - Support - Xert Community Forum (xertonline.com)